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The Impact of Long-term Isolation in Antarctica on Social Touch and Its Underlying Biological Mechanisms in Winter-over Crew Members, Assessed During Their Stay Using Standardized Touch Stimulation, Computer-based Touch Sensitivity Tests, Questionnaires and Biological Markers. (TACTICE)

28 settembre 2026 aggiornato da: Vrije Universiteit Brussel

Touching the Void: An Investigation Into the Role of a Population of Gentle Touch-Sensitive C-Tactile Afferents in Social Isolation and Somatosensory Deprivation During a Long-Duration Antarctic Stay.

TACTICE investigates how long-term isolation and reduced social touch during an Antarctic winter-over affect the way people perceive and respond to touch. The study will follow winter-over crew members at Concordia Station in Antarctica during the 2027 and 2028 seasons.

The study focuses on so-called C-tactile (CT) sensitivity. CT afferents are specialized nerve fibers in the skin that are known to be involved in the pleasant and regulatory effects of social touch. They may also play a role in how prolonged social isolation affects people during a long-term mission in an isolated, confined, and extreme (ICE) environment.

Participants will be assessed repeatedly before, during and after their stay. CT sensitivity will be measured using standardized touch stimulation and computer-based tasks involving touch-related stimuli. Participants will also complete questionnaires on social touch, loneliness, stress, relationships and coping. Saliva and blood samples will be collected to measure biological markers related to stress regulation and social processes, including cortisol and oxytocin.

The main hypothesis is that prolonged isolation and reduced opportunities for social touch change CT sensitivity and reduce an important source of stress regulation. These changes are expected to become more pronounced with time spent at the station and to be related to changes in stress responses, behaviour, attitudes and interpersonal functioning. The study aims to improve understanding of how people adapt to prolonged isolation and confinement and may help inform the planning of future long-duration missions in remote and extreme environments, including space missions.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Osservativo

Iscrizione (Stimato)

28

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Backup dei contatti dello studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

18 anni e precedenti (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

Winter-over Crew members in Concordia Station in Antarctica

Descrizione

Inclusion Criteria:

  • Member of the Concordia Station winter-over crew for the 2027 or 2028 Antarctic winter-over season and willing to participate in the study.

Exclusion Criteria:

  • No study-specific exclusion criteria.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Modelli osservazionali: COHORT
  • Prospettive temporali: PROSPECTIVE

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Change in experiential C-tactile (CT) sensitivity assessed by pleasantness and intensity ratings on a Visual Analog Scale ranging from -10 to +10 using the Manual Tactile Stimulator.
Lasso di tempo: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Experiential CT sensitivity will be assessed using standardized stroking touch, delivered with a mechanic Manual Tactile Stimulator tool to the forearm and palm at three velocities (0.3, 3, and 30 cm/s), using smooth and ribbed probe surfaces. Participants rate perceived pleasantness and intensity on a Visual Analog Scale ranging from -10 to +10. Changes in VAS scores across repeated assessments will be used to characterize experiential CT sensitivity over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in vicarious C-tactile (CT) sensitivity assessed by pleasantness and intensity ratings on a Visual Analog Scale ranging from -10 to +10 using the Vicarious Touch Task
Lasso di tempo: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Vicarious CT sensitivity will be assessed using standardized 6-second videos depicting interpersonal touch at different body locations and velocities. Participants rate the perceived pleasantness and intensity of the observed touch on a Visual Analog Scale ranging from -10 to +10. Changes in ratings across repeated assessments will be used to characterize vicarious CT sensitivity over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Change in behavioral C-tactile (CT) sensitivity assessed by interpersonal space boundary using the Footstep Task with response time in milliseconds (ms).
Lasso di tempo: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Interpersonal space boundary will be assessed using an auditory stop-distance paradigm. Participants listen to approaching footsteps and press a key when the approaching person makes them feel uncomfortable. The outcome measure is the response time in milliseconds (ms) from stimulus onset to the stop response. Changes in response time across repeated assessments will be used as an indirect behavioral measure associated with CT sensitivity.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in neurobiophysiological C-tactile (CT) sensitivity assessed by salivary cortisol concentration (µg/L) measured by saliva sampling and analyses
Lasso di tempo: Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Salivary cortisol concentration concentration will be measured as a neuroendocrine marker of HPA-axis stress regulation associated with C-tactile (CT)-mediated touch. Saliva samples are collected on one combined sampling evening and morning per month. One sample is collected before bedtime and three samples are collected in the following morning: immediately after awakening, 30 minutes after awakening, and 60 minutes after awakening. Cortisol concentrations (µg/L) and the cortisol awakening response (CAR) will be evaluated across repeated assessments over time.

Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in neurobiophysiological C-tactile (CT) sensitivity assessed by plasma oxytocin concentration (pg/ml) measured by blood sampling and analyses
Lasso di tempo: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Plasma oxytocin concentration will be measured from blood samples as a neuroendocrine marker associated with affiliative social touch and the rewarding neurobiology of C-tactile (CT)-mediated touch. Changes in plasma oxytocin concentration (pg/ml) will be evaluated across repeated assessments over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in psychosocial and behavioral characteristics associated with C-tactile (CT) sensitivity assessed using standardized questionnaires with total and/or subscale questionnaire scores.
Lasso di tempo: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Psychosocial and behavioral characteristics will be assessed using the Touch Experiences and Attitudes Questionnaire - short version (TEAQ-s), Brief COPE, UCLA Loneliness Scale, Experiences in Close Relationships - Short Form (ECR-S), and State-Trait Anxiety Inventory (STAI). These questionnaires assess social touch experiences and attitudes, coping strategies, loneliness and social isolation, attachment anxiety and avoidance, and state/trait anxiety, respectively. The outcome measures are the total and/or subscale questionnaire scores, calculated according to the scoring procedures of each instrument. Changes in these scores will be assessed across repeated measurements over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in behavioral and psychosocial adaptation associated with C-tactile (CT) sensitivity assessed using the 15-item ICE-Psychosocial Monitoring Scale with scores on a Visual Analog Scale (VAS-score 0-10).
Lasso di tempo: Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Psychosocial adaptation during isolation and confinement will be assessed using the 15-item VAS-based ICE-Psychosocial Monitoring Scale. The scale assesses physical touch deprivation/contact need, social contact and interpersonal connection, situational/temporal loneliness, attachment and separation distress, and somatic self-soothing/physical regulation. Changes in VAS-based scores will be assessed across repeated measurements over time.

Baseline (approximately 2-3 months before departure); monthly during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.
Change in tactile sensory performance associated with C-tactile (CT) sensitivity measured with the Brain Gauge Tactile Reaction Time Test (TRTT) using reaction-time and discrimination outcomes.
Lasso di tempo: Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Tactile sensory performance will be assessed using the Brain Gauge TRTT, a mouse-like device that delivers gentle tactile vibrations to the fingertips. The test battery includes simple reaction time, amplitude discrimination, temporal order judgment, and duration discrimination. Time-related outcomes will be expressed in milliseconds (ms). Changes in reaction-time and discrimination measures will be assessed across repeated measurements over time.

Baseline (approximately 2-3 months before departure); Month 1, Month 4, Month 7, Month 10, and Month 12 during the Antarctic winter-over; 6 months post-mission; and 2 years post-mission.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Collaboratori

Pubblicazioni e link utili

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Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

1 ottobre 2026

Completamento primario (Stimato)

1 febbraio 2031

Completamento dello studio (Stimato)

1 febbraio 2031

Date di iscrizione allo studio

Primo inviato

7 settembre 2026

Primo inviato che soddisfa i criteri di controllo qualità

28 settembre 2026

Primo Inserito (Effettivo)

5 ottobre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

5 ottobre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

28 settembre 2026

Ultimo verificato

1 agosto 2026

Maggiori informazioni

Termini relativi a questo studio

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • EC-2026-106

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Descrizione del piano IPD

Individual participant data are not planned to be shared with researchers outside the study consortium and sponsoring organizations. Study findings will be disseminated through scientific publications and presentations.

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .